And john claffy



NOMOM E. E. GEEENE.

UNDERGROUND NDUIT. NQ. 400,764. Patented Apr. 2, 1889.

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Nv PETERS. PhDXLilhogmphur. Washington. DV C.

UNITED STATES A PATENT OFFICE.

PATRICK R. GREENE, OF BROOKLYN, NEW YORK, ASSIGNOR OF TWO-THIRDS TO PETER BYRNE, OF JERSEY CITY, NEW JERSEY, AND JOHN CLAFFY,

OF BROOKLYN, NEW YORK.

UNDERGROUND CONDUIT.

V SPECIFIGATIN forming part of Letters Patent No. 400,764, dated April 2, 1.889.

Application filed September 15, 1888. Serial No. 285,467. (No model.)

To all whom it may concern,.-

Be it known that I, PATRICK R. GREENE, of

Brooklyn, New York, have invented an Improved Underground Conduit, of which the/ following is a speciiication.

This invention relates to an underground conduit for wires so constructed that access to the wires may be readily had for the purpose of making repairs or connections without tearing up any part of the street.

The invention consists in the various features of improvement, more fully pointed out in the claim.

In the accompanying drawings, Figure 1 is a top view, partly in section, of a portion of a street provided with my improved conduit. Fig. 2 is a vertical transverse section on line no Fig. l; and Fig. 3, a perspective view of part of the conduit.

The letters a a represent a row of houses bounded by three streets. b is the sidewalk, and b the curb. The conduit is placed in the roadway a short distance beyond the curb, where a trench is dug for its reception. The conduit consists of rectangular sections c, of cement, that are provided with a series of longitudinal tubular perforations, d. The drawings show nine such tubular perforations; but a greater number is generally used. The conduit is formed,preferably, by the use of cores, (such, for instance, as described in Patent No. 380,030, granted to me March 27, 1888,) around which the cement is packed, after which the cores are collapsed and withdrawn. The sections c c open at each end into wells or chambers e, and these chambers are extended into the street beyond the line of sections c. The upright walls of the projecting parts of the wells are formed by providing one of theupriglit sides of the conduit with square outward eX- tensions. Thus the entire conduit is one continuous structure. Thus the conduit will be T-shaped in cross-section at each well.

The wires f are placed into the tubes d and traverse that part of the well which is in line with the. tubes. The outwardly projecting part of the well serves as a man-hole, from which the wires are readily accessible. Above the man-hole part of the Well there is the cover g, while the rest of the well, together with the entire conduit, is permanently buried. That wall e of the well e which is opposite the outwardly-projecting portion thereof and which faces the curb Z9 has an opening, e2, through which connections are made with the houses, as shown.

It will be seen that in this conduit the wires may be readily repaired and connections may be readily made without tearing up the street. A conduit constructed as above will, moreover, be exceedingly durable. If desired, those parts of the wires that traverse the well may be covered with some insulating material to protect the workmen in the well.

I am aware of Patent No. 355,798, granted for a conduit for electric wires, the same comprising a series of flues with an unoccupied space at some point of its length, so that access may be had thereto from the vaults arranged under the sidewalk; but I am not aware that any one has heretofore provided a means of accessk to a space in a conduit by forming the same integral with one of the cond uit-sections, or having the well arranged outwardly or at a point beyond the sidewalk, so that the well or means of access constitute a portion or integral element of one of the sections, and laid at the same time without additional vaults or excavations.

What I claim is-` As a'n improved article of manufacture, a conduit-section composed of cement and having a laterally-arranged well or man-hole formedintegral therewith to form a T in cross-section, and a series of longitudinal tubular perforations extending from the well the entire length of the section, and also having the inner wall of the well provided with an opening, e2, the Whole being adapted when placed in a street to have the well extending outwardly from the curb, substantially as specified.

PATRICK R. GREENE. Witnesses:

F. v. BEIEsEN, HENRY E. RoEDER. 

